Improvement in filters



J. FOLEY.

l FILTER. No. 192,750.. -ragentea Ju1y' 3, '123177.v

N-PETERS. PHOTO-UTHOVRAFHER. WASHINGTON, D. C.

UNITED STATES,

PATENT @Erica JAMES EoLEY,foE MONTREAL, QUEBEC, CANADA.

IMPROVEMENT IN FILTERS.

Specilication forming part of Letters Patent No. 192,750, dated July 3, 1877; application iled v January 31, 1877.

To all whom #may concern:

Be it known that I, JAMES FOLEY, of Montreal, in the Dominion of Ganada, have invented certain new and useful Improvements in Filters; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specication, and in which the ligure illustrates a vertical section of my improved filter.

This invention relates to a certain improvement in filters; and it consists of the parts of which it is composed, substantially as herein after more fully described and claimed.

In the annexed drawing, A refers to an upright cylinder, which may be supported in any known Way, and in proximity with the servicepipe,7 with which it is connected, as will be hereinafter pointed out. der A is placed a dome or air-chamber, B, resting upon a ilange upon the cylinder, to which it is lirmly secured. The dome or airchamber B is let into the cylinder a suitabhl distance, and provided with a bottom having an orifice, b, for the egress of air.y The airchamber B equalizes the current of filtration, and prevents injury to the filter upon the sudden opening or closing of the service-pipe cocks or valves. Within the cylinder A are a number of receptacles, C D E, having perforated bottoms, and placed one upon the other, the lower one resting upon internal flanges c c of the cylinder. Upon the upper receptacle E is placed a perforated diaphragm or plate, c, which is held down thereon by an internal ring, d, reaching up to the bottom of the air-chamber B, or by any other means of fastening, to resist the upward pressure of the water from the water-works main. Within these receptacles is yplaced the filtering material or substance, the lower one being preferably :filled with sponge, the next or middle one with alternate layers of felt and dividing rings or bars, and the upper one with animal charcoal, wood charcoal, clean silicious sand, gravel, or other suitable material. I prefer Upon the cylinto use the first-named of the last-enumerated materials. 'Ihe upper edges of these recep-` 'is the pipe which connects the filter with the water-works main, and G is the dischargepipe, also connectedto the service-pipe, and which is connected with the supply-pipe F by the pipe H. fIo the pipe Gis supplied two valves or cocks, It 7c', one on each side of the point of connection between it and the pipe H. The pipes-F and H are also provided with valves or cocks l m, the valve or cock l being between the connection of the pipe F with the cylinder A and the conjunction of the pipe H with the said pipe F. By opening the valve Zand closing the valve or cock m, the filter can be filled,and the water, thus filtered, be drawn off or discharged by opening the cocks or valves k 7c. Close the valves or cocks k and l, and open' the cocks m and k and valve l,closing the discharge-pipe j in the bottom h of the cylinder, and the liow of the water will be directed downwardly in the filter, by which the latter will be cleansed. Instead of the valve?) disposed over the entrance of the pipe j, a cock or globe-valve, similar to the othernamed valves, may' be inserted in the said pipe, operated in the usual Way. When it is desired to have the water enter the service pipe or pipes without the necessity of being lltered, close the cocks or valves l and k, and open the valves or cocks 7c and m. To draw oft' the refuse water in the service-pipes at night, to prevent its freezing therein in cold weather, close the cocks or valves l m, and

open the valves or cocks k la and valve i of the pipe 7' in the bottom of the cylinder.

l Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

The cylinder or reeeptacleA, having a sedi- 'In testimony that I claim the foregoing as.. mentchamber, h, perforated receptacles for my own I hereunto afx my signature in presreceiving the filtering material, pipes F, G, ence of two Witnesses.

and H, provided wit-h valves, and an air-cham- JAMES FOLEY. ber, B, with or without its transverse plate, Witnesses: having the orifice b, substantially as and. for W. A. MOBRILL, the purpose set forth. y ARTHUR FERNS. 

